Steam-boiler setting



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A. PRIESTLEY STEAM BOILER SETTING june 17 192 Filed pt. 22, 1922 s Sheets-Sheet 1 ill/l June 17, I924.

A. PRIESTLEY STEAM 501mm SETTING 3 Shuts-Sheet 2 Filed Sept. 22, 1922 1 an k 4 AZNA Fig.5.

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" A. PRIESTLEY STEAM BOILER SETTING Filed Sept. 22, 1933 3 Sheets-Sheet 25 Raff;

Patented June 17, 1924.

rarest ALBERT PRIE S'ILEY, CF HALIFAX, ENGLAND.

STEAM-BOILER SETTING.

Application filed September 22, 1922. SerialNo. 589,847.

To all 1072 m it may concern:

Be it known that I, ALBERT PRIESTLEY, a subject of the King of Great Britain, residing at Halifax, in the county of York, England, have invented new and useful 1mprovements in and Relating to Steam Boiler Settings, of which the following is a specification.

This invention consists of improved settings for steam boilers, particularly of the Lancashire and Cornishtype, and my object is to effect considerable economy in fuel and increase the steam raising efliciency of the boiler by an improved construction and arrangement of fines for conducting the waste heat, hot gases, or the like from the boiler furnaces or furnace to the chimney shaft. The construction of these fiues greatly increases the length of flue traverse, and the passage of the hot gases through the same constitute a series of heat streams which are localized and distributed over the boiler shell from the back to the front and from the front to the back thereof, the maXi-.

mum heat being applied where the weight and depth of water is greatest, and is gradually absorbed by the boiler until on appreaching the water level or where the weight of water is least, the temperature is correspondingly or proportionately less. The continued absorption of the heat of the hot gases by the boiler during their lengthened traverse through these fines, is such as to effect a substantial reduction therein before discharging into the main flue, which not only increases the boiler efliciency as aforesaid, but also reduces the volume of smoke entering said flue, and the wear and tear on both fines and chimney.

According to my invention, 1 construct the settings so as to form a number of fines beneath and at the sides of the boiler. These flues connect the boiler furnaces or furnace with the main flue or chimney shaft, and comprise a central flue leading out of the back chamber receiving the waste heat from the furnaces, towardsthe front of the boiler, where the hot gases therein are now divided by suitable means into two separate streams, each stream passing into a flue parallel to the central flue and upon each side thereof. Each of these side flues has extensions which pass from the front to the back, and from the back to the front of the boiler, the different levels being connected by uptakes at one end or the other, asthe case may be, until they eventually discharge into the main flue or chimney shaft. In thismanner, it will be seen, two separate heat streams in a concentrated form are fed fromthe central or maximum heat flue, the heat being localized and in contact with the boiler shell all the way, whilst the length of traverse'is more than doubled, giving the results desired.

l attain these objects by the means illustrated in theaccompanying drawings, in which Fig. 1 is a sectional plan view of my invention taken substantially along the line 1-1 of Figure 2, and showing the device applied to a Lancashir boiler; Fig. 2 is a sectional end view. taken along the line 2-2 of Fig, 6; Fig. 3 is a similar view to Fig. 2 through the line 83 of Fig. 1 and Fig. 6; Fig. 4 is a longitudinal sectional elevation of my improved boiler setting showing boiler in position thereon; Fig. 5 is a longitudinal sectional plan of my invention, through the line 5-5 of Fig. 2, Fig. 6 is a vertical longitudinal sectional view; Fig. 7 is a horizontal, longitudinal sectional view of the invention.

Referring to the drawings, 1 is a Lancashire boiler, .2, 2, are the furnaces or furnace tubes thereof, whilst 3 is the back chamher or superheater chamber into which the waste heat from the said furnaces is normally discharged.

In constructing my invention, 1 partition the flue ordinarily leading from the chamber 3 to the boiler front, into preferably three or more separate parallel flues, the central flue 5 having preferably a capacity equal to both the adjacent side flues 6, 7, which are partitioned off at this end from the chamber'3. The flue 5 leads out of the chamber 3, under the boiler 1 towards the boiler front, and v the partition walls 8,-8, stop short upon approaching a conical midfeather 4- situated opposite the mouth of the flue 5. The hot gas impacting upon the sloping sides of the said midfeather ar divided into two separate streams which return tothe back ofthe boiler through the fines 6, 7, forming the second traverse. These fines next rise and communicate by means of uptakes 9, 9, with continuations 10,10, running parallel along each side of the boiler, and formed substantially in the lower half of the. existing side fines The continuations or extensions 10, 10, shown more clearly at Fig. 2, are created by forming a lip 11, 11, on the side Walls thereof for supporting inclined slabs, blocks, or the like 12, 12, leaning or otherwise placed in contact with the boiler shell and serving as a partition. The continuations 10, 10, upon each sidereturn to the boiler front and form the third traverse, then they again rise and communicate by further up takes 13, 13, with further continuations lt, let, above the partitions 12, 12, and returning to the back of the boiler once more, form the fourth traverse, which leads directly into the main flue or chimney shaft 16. The fines are controlled in the ordinary way by the: dampers 15, 15.

It will: be observed, by this improved construction of setting the length of flue traversed is more than doubled, the hot gases from the furnaces areconcentrated and conducted in two separate streams backwards and forwards along the boiler shell, so that when they eventually pass into the main flue, the heat therein has been comparatively utilized or substantially reduced, with the results before described.

adjoining side lines and communicating with h the normal superheater chamber receiving the waste heat direct from the boiler furnaces, a conical midfeather at the front of the boiler dividing the waste heat issuing from the central flue into two separate streams and directing the same into the adjoining side iiues; passages connecting the said side flues with the normal side fines; partitions dividing each of the normal side fines into two superimposed flues, openings at the frontof the boiler connecting the said superimposed fiues, and vertically operating dampers controlling the discharge outlets therefrom into the normal main fine or chimney.

In. testimony whereof I have signed my name 'to this specification. H

' V ALBERT PRIESTLEY. Witnesses:

ALFRED REED,

CHARLES SUIOLIFFE. 

